Stimulation of a reconstituted, microsomal NADH oxidase system by carboquone, a quinoid anticancer chemical.

Carboquone was found to greatly stimulate the aerobic NADH oxidation in the presence of both the partially purified NADH-cytochrome b5 reductase and cytochrome b5 prepared from hepatic microsomes by acting as an electron carrier from cytochrome b5 to molecular oxygen. Other quinoid anticancer chemicals, mitomycin-C, adriamycin, and daunomycin practically failed to do so.